When does subduction occur in a convergent plate boundary movement? * When the density of both plates is the same. When one plate is denser the other plate. When both plates are heated by the mantle. O No subduction occurs. Which best describes the rocks in the mid ocean ridge? * It forms a shallow valley It is youngest at the middle of the ridge. The center is relatively cooler compared to the surrounding area. The rocks at the ridges changes its composition when it moves away

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